253151321 has 4 divisors (see below), whose sum is σ = 254160144. Its totient is φ = 252142500.

The previous prime is 253151309. The next prime is 253151323. The reversal of 253151321 is 123151352.

It is a happy number.

253151321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 253151321 - 2²⁶ = 186042457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253151323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 504035 + ... + 504536.

It is an arithmetic number, because the mean of its divisors is an integer number (63540036).

Almost surely, 2^253151321 is an apocalyptic number.

It is an amenable number.

253151321 is a deficient number, since it is larger than the sum of its proper divisors (1008823).

253151321 is a wasteful number, since it uses less digits than its factorization.

253151321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008822.

The product of its digits is 900, while the sum is 23.

The square root of 253151321 is about 15910.7297444209. The cubic root of 253151321 is about 632.5964241336.

The spelling of 253151321 in words is "two hundred fifty-three million, one hundred fifty-one thousand, three hundred twenty-one".